Yes D is the correct answer
        
                    
             
        
        
        
Answer:
B
Explanation:
'Unfolding a line of thought, step-by-step, to try to convince the
reader of something'
this one makes the most sense and is what i believe the answer your looking for, taking it step-by-step and unfolding a line of thought is how you develop an argument so i am convinced this is the right answer.
        
             
        
        
        
C. Unexpected and surprise make it redundant - a surprise should be unexpected!
        
                    
             
        
        
        
What is this question on...and do you still need the answer???